Visualizing the actual training data shown in Figure REF  reveals that existing datasets feature non-practical captures of either (1) teleporting/fast camera motion or (2) quasi-static/slow scene motion.
The former is not representative of practical captures from a hand-held camera, e.g., a smartphone, while the latter is not representative of moving objects in daily life.
Note that, out of the 23 multi-camera sequences that these prior works used for quantitative evaluation, 22 have teleporting camera motion, and 1 has quasi-static scene motion – the Curls sequence shown at the 5th column in Figure REF .
All 13 single-camera sequences from HyperNeRF [1]} used for qualitative evaluation have quasi-static scene motion.
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